Parallel extensible ruler.



No. 692,794. Patented Feb. 4, |902.

F. A. MUBLEY. PARALLEL EXTENSIBLE BULEB. (Application ma rb. 1. 1901,)(No M odel.)

/N VE N TOI? M an THE NcmRls PETERS co., PHoTaLITHo.. WASHINGTON, n. c.

UNITED STATES' PATENT @Erica `FREDERIC A. MORLEY, OF BROOKLYN, NEW YORK.

kPARALLEL ,EXTENSIBLE RULER.

SPECIFICATION forming part of Letters Patent N o. 692,794, datedFebruary 4, 1902.

Application filed February 1, 1901. .Serial No. 45,648. (No model.)

To all whom, t may concer-r1,.-

Beit known that I, FREDERIC A. MORLEY, a citizen of the United Statesand a resident of Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Improvements in ParallelExtensible Rulers, of which the `following is a specication. y

My invention relates to improvements in extensible parallel-rulers formarking and measuring parallel lines, &;c. and the objects of myinvention are, rst, to provide a ruler that can be extended on aperfectly straight line, so that a parallel line can be drawn from anygiven point of a straight line and to a much greater width than theordinary parallelruler; second, to'provide a parallel-ruler that can beextendedin length when desired, thus obviatin g the necessity of havinga long ruler to carry around or lie around in the way of other material;third, to provide a ruler with which diametrical lines canY be drawnfrom a given center, from which a circle or any portion of a circle canbe drawn, thus performing in a great measure the work done withCompasses; fourth, to provide a ruler with which angles or angular linescan be drawn parallel to each other and for obtaining a square or miteror other angles, and, fifth, to provide a ruler having the combinedadvantages of a square and compasses, a diainetrical ruler, aparallel-ruler, an extensible ruler, and a try-square. means illustratedin the accompanying drawings, in which- Figure 1 is a view of the rulerwhen closed in compact form. Fig. 2 is a View of the ruler when extendedin length. Fig. 3 is a view ot" the ruler when extended in width, landFig. 4 is a view of the center point F.

Similar letters referto similar parts thro ughout the several views.

The bars A B o and the unks D' D2 D3 D4' D5 D6 constitute the device. Tothebars A, B, and O are attached theA links D' D2 D3 D4 D5 D'i in suchmanner as to swing on pivots, and the links D D`a DS-D4 D5 D6 being ofequal length keep the bars A, B, and C parallel to each other. (See Fig.3.) When required to be lengthened, the bar B is extended until the barA and bar B are on a line with I attain these objects by each other.(See Fig. 2.) On the lower end of bar A is a'lip G, through which a holeis bored and a thread cut to receive the center point F. (See Fig. 4t.)y The center point F, provided with a thread, is screwed in from theunder side of bar A, so that center ot` point F is on a direct line withedges of bar A and bar B, allowing the whole device to swing around on Fas the pivotal point, so as to draw diametrical lines from the point Fand also to draw circles or circular lines. By placing the bar C inposition, as indicated in Fig. 2, and removing the point F from the lipG and inserting it into the lower hole E' through bar A, having a threadto receive point F, so that point F can also be inserted into a holeprovided with a thread through link DG to receive point F, so that theparts can be firmly secured together and an angle of forty-five degreesobtained. IE point F is inserted in the upperhole E and link D6 is alsoturned to that point and secured, an angle of fortytive degrees isobtained. If point F is inserted in center hole E and link D6 is alsocarried toA that point and secured, an angle of ninety degrees'or asquare is obtained.

To the bar A is attached a set-screw H, so that links .D5 and lD6 can beplaced atl any angle and rmly held by set-screw H, thereby making asubstantial try-square.

The links Dl D2 D3 D4 can be of curved shape, so as to draw curves orcurved lines, if so desired.

By reference to Fig. 3 it will be seen that the bars B and C areextended on a straight line from each other or can be extended either xabove or below, if desired. By placing the bar A on any given line orpoint a` parallel line can be drawn from either or both sides of the barA.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. yThe combination in an extensible rule of the ruling-barA, andtheruling-bar B, connected together by means of the links D', D3 and D5with the ruling-bar C connected to the .ruling-bar A by means of thelinks D2, D4 and D6, all being joined together in such manner so as tobe capable of being extended `in lengthto make a long ruler, and alsocapable of being extended in Width so as to make a Wide ruler, for thepurpose as herein set forth and described.

2. The combination in an extensible ruler of the parallel bars A and Bconnected together by means of the links D', D3 and D5, and the bar Cconnected and parallel to the bar A by means of the links D2, D4 and D6with the set-screw H to clamp the parts together so that the links D',D2, D3, D4, D5, DG and the bars A, B and C can be secured and held atany desired point or angle, all being joined together in such manner asto be capable of being extended soas to make a long parallel-ruler or awide parallel-ruler, as herein set forth and described.

3. The combination in a parallel extensible ruler of the bar A having alip G and center point F, the screw-holes E', E2, E2, the setscreW H toclamp the parts together for trying and obtaining angles, the link DGhaving screw-hole to receive point F so that the parts can be clampedtogetherfor obtaininga square and angles, with the bars B and C and thebraces D', D2, D2, D4, D5, all for the purpose as set forth anddescribed.

4. The combination in a parallel-ruler of the bars A, B and C, capableof being extended in such manner as to lengthen the ruler or4 Widen theruler, With the links D', D2, D2, D4, D5, D6, for obtaining squares andangles, all being capable of being folded up in a conlpact form,substantially as set forth and described.

5. The combination in an extensible ruler of the bar A having a lip Gr,a center point F, the holes E' E2 and E3 and the set-screwr H, of theparallel bars B and C, said bars A and B being connected by the links D'D3 and D5, said bars A and C being connected by the links D2 D4 and D5,said link D(i being provided With a hole arranged to register witheither of the said holes E E2 or E3 in the bar A, and to receive thepoint F passing therethrough, substantially as described.

Signed at Brooklyn, in the county of Kings and State of New York, this30th day of January, A. D. 1901.

FREDERIC A. MORLEY. Vitnesses:

CLARENCE A. PHELAN, R. C. TALBOT-PERKINS.

